# SDR SWAA2023021690813

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2023
- Submitted: February 16, 2023
- Operation: Air carrier
- Aircraft: N565WN
- Make and model: Boeing 737-76Q
- Registry model: [Boeing 737-76Q](https://openairdocs.org/model/boeing-737-76q) (OpenAirDocs)
- Aircraft serial: 30282
- Aircraft time: 56,383 hours, 37,305 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Condition: Corroded
- Location: Zn 100 Fus Lower
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2023021690813

## Discrepancy

CORROSION ON FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT RBL 22 BS 500A+14; BS 500A+18; BS 500B+6; BS 500B+14; BS 500C+2; BS 500C+6; BS 500C+12.<[01] VERIFIED APPLICABILITY SRM 53-60-53-01-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE.<BR><BR>REMOVED CORROSION ON FWD CARGO BAY FLOOR TON SIDEWALL SUPPORT AT RBL 22 500A+14 IAW SRM 51-10-02.<BR> <BR>EVALUATED DAMAGE REMOVAL AT BLENDED AREA L=1.000'' W=0.700' ORIGINAL THICKNESS 0.040' REMAINING 0.022' LOSS 0.018'; MAX MAT REMOVE ALLOWABLE 0.004'; FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PARA 4A (2) FIG 103 DETAIL D.<BR>TOOL ID: ATS1225 S/N: UNKNOWN DUE:08/2023<BR><BR>STEPS 1-7 PARTIAL COMPLETED;[02] VERIFIED STEPS 1-7 AND CORRECTIVE ACTION 1.;[03] FABRICATED; LOCATED AND DRILLED FLOOR TO SIDEWALL SUPPORT FROM BS 500A TO BS 500D AT RBL 22; USING MATERIAL BAC1496-444#7075T62 LOT 1501239-1 IAW SRM 51-40-05-0G-0 AND DWG 143A7501.<BR>OK TO CHEMICAL CONVERSION COATING AND PRIMER.;[04] VERIFIED CORRECTIVE ACTION 3 AND STEPS 1-7.;[05] VERIFIED MEASURUEENT TABLE.;[06] APPLIED CHEMICAL CONVERSION AND COATING PRIMER ON SIDEWALL SUPPORT IAW SRM 51-20-01 AND SOPM 20-41-02;[07] VERIFIED CORRECTIVE ACTION 6.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.